Baterie UPS 12V/ 12AH Yuasa NP12-12-TW, 3-5 years----https://www.yuasa.co.uk/batteries/industrial/np12-12.htmlCapacity at 20-hour Rate (Ah) : 12Capacity Ah (20-HR) : 12Length (mm) : 151Width (mm) : 98Height (mm) : 97.5Total Height (mm) : 97.5Weight (kg) : 4.05Nominal Voltage : 12Capacity Ah : 12